Last spring and early summer, from the eastern shores of Cape Ann, I repeatedly heard Common Loons calling their hauntingly beautiful yodeling and tremolos. I never recall hearing these wonderfully eerie songs on Cape Ann prior to this past summer. Later in the season, we had what I think was a juvenile, daily foraging off Niles Beach and I was fortunate to capture the young Loon diving for small crabs.
I love to imagine Loons nesting o Cape Ann and just had to know more. Here are some interesting facts learned that lead me to believe we just may someday have Common Loons (Gavia immer) again nesting on Cape Ann!
Common Loons only breed in freshwater, at lakes or ponds that are at least 10 acres. Niles Pond qualifies as a potential nesting site as it is 36 acres. One reason Loons need large areas of fresh water is that their legs are very far back on their bodies and their bodies are unusually heavy. They don’t walk well on land and need at least 1/4 of a mile of open water to take off. According to the U.S. Fish and Wildlife Service, “The preferred breeding habitat of Common Loons is large and small fish-bearing lakes with clear, warm, shallow water, and little or no human disturbance.”
That is not to say they are not good flyers. Once airborne, the Common Loon can reach speeds of 75 miles per hour.
Fish-eating Loons are an indicator species at the top of the aquatic food web and their heavy bones serve them well for deep diving. Because they live so long (20- to 30 years) Loons have been used as an indicator for heavy metals, bio- contamination and acidity.
Loons also dive for crustaceans, frogs, insects. mollusks, and vegetation.
Juvenile Common Loons migrate to coastal sea areas for two years before returning to the site of their origin. Here they will live for three more years until they are mature enough to breed. Part of Loon recovery strategies is to capture very young birds and introduce them to a freshwater lake or pond, sort of tricking them into thinking that is their place of origin. This was successfully accomplished at Fall River. Wouldn’t it be fantastic to try this at Niles Pond?? What ponds in your area of Cape Ann may qualify as a possible nesting site?
I think it would be magnificent if the beautiful calls of the Common Loon were an annual event we all came to look forward to. What do you think?





















































































